Unexploded shell

Subject: Unexploded shell 19 general knowledge quiz questions. It should take around 4 minutes to complete all the questions.

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Unexplained markings

Subject: Unexplained markings 9 general knowledge quiz questions. It should take around 2 minutes to complete all the questions.

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Active experimentation

Subject: Active experimentation 19 general knowledge quiz questions. It should take around 4 minutes to complete all the questions.

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